2251561133 has 2 divisors, whose sum is σ = 2251561134. Its totient is φ = 2251561132.

The previous prime is 2251561121. The next prime is 2251561153. The reversal of 2251561133 is 3311651522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1228712809 + 1022848324 = 35053^2 + 31982^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251561133 - 2⁸ = 2251560877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2251561096 and 2251561105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251561153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125780566 + 1125780567.

It is an arithmetic number, because the mean of its divisors is an integer number (1125780567).

Almost surely, 2^2251561133 is an apocalyptic number.

It is an amenable number.

2251561133 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251561133 is an equidigital number, since it uses as much as digits as its factorization.

2251561133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 2251561133 is about 47450.6178358091. The cubic root of 2251561133 is about 1310.6736882157.

The spelling of 2251561133 in words is "two billion, two hundred fifty-one million, five hundred sixty-one thousand, one hundred thirty-three".